. ♪ >> and we will see all of that tomorrow, presidential historian douglas brinkley you just heard from knows more than anyone about the 56 inaugurations that came before today's. he joins me now. you focus a lot on presidential history but inaugurations in particular, as particularly important, why are they so interesting to you? >> the first one with thomas jefferson here in washington, d.c., i mean, we thought the two political parties were going to destroy america. like jefferson and adams, here jefferson in his inauguration, reminded people, i'm not a republican or a federalist today we're americans. they become our great healing ceremony. we just had a brutal 2012 election cycle. and ostensibly for a couple days it's an opportunity to reflect on american history, reflect on our past and create a sense of unity again. >> you say one inauguration was the most raucous, what was that? >> andrew jackson, because he was the great commoner, the old hickory, the battle of new orleans hero. and came in. when he got to the white house they were serving cider and things. people came in and t